A few years ago I had a website up with all of the QZar protocol specs, but I don't think it's online anymore.

I have a vague understanding of the network specs for Q2000 (since I wrote them) and a simplified version of these should deal nicely with the car player. I'd have to check with Patrick exactly what will be needed for the multidrop side of things, but it'll probably be quite easy. I doubt we need the optoisolators and so forth that QZar energisers use.

I'll knock up a suggested spec later and see how many people hate it. Even if we agree on something I doubt the development team will have time to rework the empeg end of things for a while. I know Hugo was muttering about moving to a more convenient binary protocol at some point, though.

Rob